Roy,
The 38th Georgia was an Army Of Northern Virginia unit. The CSA Army that defended Atlanta, was the Army of Tenneessee. The 38th was part of the Lawton-Evans-Gordon Brigade, and surrendered with Lee's Army of N. Virginia on 9 Apr., 1865.There is a small history, including the battle flag at:

http://www.civil-war.net/38thGA/dedication.htm

There are some images of the 38th at:

http://users.erols.com/brant/GeorgiaBrigade/images.html

There is a messageboard for the 38th Ga. at:

http://pub73.ezboard.com/fthecivilwarhomepagediscussion2824frm14

Webpage about the 38th Ga. at Gaines, Mill, Va. is at:

http://users.erols.com/brant/GeorgiaBrigade/WHB072762.html

...........hope this helps. Neal

P.S. If you need help locating his CSR (compiled service record), let me know. It's available at the Dept. of Archives and History in Atlanta.